Ask Amp Man

Biasing a Bassman

February 11, 2010
Changing the tubes on a pawnshop Bassman 50 - which to get and how to bias?
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January 14, 2010
Getting great Fender Twin Reverb tone at volumes that won''t kill your ears
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Two Letters about … Well, Twins!

December 17, 2009
Two Fender Twin Reverb owners pose questions about their speakers
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Turn The Amp OFF… Or Else

November 18, 2009
When a business traveler leaves his amp on at home for a month, can Jeff save his once-glorious tone?
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Making a Supro Super

October 21, 2009
A 1948 Supro with some fuzz and speaker heat issues
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Fender Amp Bias and Impedance

September 18, 2009
Jeff answers two questions this month: tips on biasing a Fender Deluxe and matching a Bassman head to cabs with mismatched impedance
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September 2, 2009
I have a wonderful SD45 that I love, and I have a question about using an attenuator with it. I often use a THD Hot Plate (8 ohms) between
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New Speaker Plug for an Ampeg B-15-N

August 19, 2009
An Ampeg B-15-N without a speaker plug
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Tube Amp Troubleshooting 101

July 22, 2009
Diagnosing a dead Blues Junior with universal troubleshooting tips
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Differences in Fender Concert 4x10 Amps

June 17, 2009
The differences between early Fender Concert amps
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Speaker Loads and Overheating Amps

May 20, 2009
Jeff tackles a Sears Twin Twelve 1484 paired with mismatched ohms and a Crate that resets itself
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Effects Loop Issues

April 21, 2009
Issues with an effects loop in a Soldano and feedback in a Mesa Boogie F-50 ran with pedals
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Negative Feedback, Fender Bassman 10

March 17, 2009
A look at negative feedback and hum balance
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Peavey Classic 50/410 Combo

February 16, 2009
A Peavey Classic 50/410 combo suffers from a swirling hum.
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Tackling Treble Trouble

January 15, 2009
Jeff tries to tame some out-of-whack treble on a 1983 Marshall JCM 800 4210 Combo
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Diagnosing a Distressed Tube Amp

December 16, 2008
A Fender Hot Rod Deluxe is on the fritz, and Jeff has five possible causes to check out
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Choke Troubleshooting

November 11, 2008
Popping issues arise when a choke is installed in an amp.
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Tubes for Tweeds

October 13, 2008
Jeff, I used to get Musician’s Hotline Magazine delivered and always headed straight for the “Ask Budda” column. About 98 percent of the stuff was over my head, but
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Impedance Mismatch and Vox Mods

September 9, 2008
Jeff dives into a problematic speaker and cabinet setups, but gives a clear-cut solution.
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Super Reverb & Blue Voodoo

September 3, 2008
I own a mid eighties JCM 2205 Split Channel Marshall. Can you suggest a tube that will help boost my gain?
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